Over the weekend, the world was gifted a teaser for an upcoming ITV documentary hosted by The Queen's trusted confidante and celebrated naturalist Sir David Attenborough, also 91, called The Queen's Green Planet.

In the heartwarming teaser, the two icons enjoy a stroll around the lush gardens of Buckingham Palace as they discuss Her Majesty's inspiring initiative - The Queen's Commonwealth Canopy, a conservation project which sees the protection of forests throughout the Commonwealth nations.

"Trees have been a part of the Queen's life, all her life," Sir David Attenborough remarks in the clip.

It then cuts to the monarch joking about a rather shabby bush in her otherwise perfectly manicured garden.

"That one we won't look at it. Someone sat on it!" The 91-year-old deadpans as Attenborough cracks up.